<template>
  <div>
    <div class="search">
      <input v-model="keyword" class="search-input" type="text" placeholder="输入城市名或拼音" />
    </div>
    <div class="search-content" 
      v-show="keyword"
      ref="search">
      <ul>
        <li 
          class="search-item border-bottom"
           @click="change(item.name)"
           v-for="item of list"
           :key="item.id">{{item.name}}</li>
        <li v-show="hasNoData" class="search-item border-bottom">没有找到匹配数据</li>
      </ul>
    </div>
  </div>
</template>
<script>
import Bscroll from 'better-scroll'
import { mapActions } from 'vuex'
export default {
  name: 'CitySearch',
  props:{
    cities: Object
  },
  data(){
    return {
      keyword: '',
      timer: null,
      list: []
    }
  },
  computed:{
    hasNoData(){
      return !this.list.length
    }
  },
  methods: {
    ...mapActions(['changeCity']),
    change (value){
      this.changeCity( value )
      this.$router.push('/')
    }
  },
  watch:{
    keyword(){
      if( this.timer ){
        clearTimeout( this.timer)
      }
      if(!this.keyword){
        this.list = []
        return
      }
      this.timer = setTimeout(()=>{
        const list = []
        for( let i in this.cities){
          this.cities[i].forEach( value => {
            if(value.spell.indexOf(this.keyword) > -1 || 
              value.name.indexOf(this.keyword) > -1){
                list.push(value)
              }
          } )
        }
        this.list = list
      },100)
    }
  },
  mounted(){
    this.scroll = new Bscroll(this.$refs.search,{
      click: true
    })
  }
}
</script>
<style lang='stylus' scoped >
  @import '~styles/varibles.styl'
  .search 
    padding 0 .1rem
    height :.72rem
    background :$bgColor
    .search-input
      box-sizing :border-box
      height :.62rem
      line-height :.62rem
      padding 0 .1rem
      width :100%
      text-align :center
      border-radius :.06rem
      color :#666
  .search-content
    overflow hidden
    position absolute
    z-index 1
    top 1.58rem
    left 0
    right 0
    bottom 0
    background #ccc
    .search-item
      line-height .62rem
      padding-left .2rem
      background #ffffff
      color #666
</style>
